know-nothing

I know nothing at all about the recent happenings there.

对那里近来发生的事我一点儿也。

This might seem very perplexing to those who know nothing about it.

对那些对它一无所的人来说可能显得很难理解。

He knows nothing of unprofessional matters.

与专业无关的事, 他什么也。

I hasten to add that I knew nothing of the fraud at the time.

我忙迭地补充说，我当时对那个骗局一无所。

However, we can know nothing through this process about the "numina" (inward realities) of nature.

但是，在一过程中，我们对自然界的“numina”（内在现实）依然毫无所。

He closed up when he found he knew practically nothing about the subject under discussion.

当他发现自己对所讨论的问题实际上一无所时, 就再开口了。

I know nothing but Wikipedia is a cyclopedia which is easy to use,free and grow continuously.

我只维基是一个非常好用的，免费的，断成长的百科全书。